288 ENTOMOLOGICAL NEWS [Dec., '19 



ANDRENTDAE. 



Andrena birtwelli Ckll. T. S., 1 9 at Potcntilla. 



Andrena lewisii Ckll. T. S., 1 9 at Rosa. 



Andrena moesticolor Yier. & Ckll. L. P. T., at Pntcntilla. 1 $. 



Andrena apacheorum Ckll. L., 1 9 , 1 <5 . L. P. T., 3 $, at 

 Erigeron and Senecio. 



Andrena topazana Ckll. L., 1 9, July 19, the dorsal pubescence 

 gone and wings tattered. 



Sphecodes eustictus Ckll. I... 5 9. T. S., 1 9. H.. 1 9. T. L., 

 1 9. This species has remarkable altitudinal range; it was describ- 

 ed from the lower part of the Transition Zone. 



Sphecodes millsi n. sp. 



f? . Length about / mm. ; head and thorax black, with silvery white 

 hair, dense on face: apical half of mandibles red; legs black, with the 

 knees, fore tibiae except a large mark on outer side, apices of 

 middle and hind tibiae, and all the tarsi, clear ferruginous; antennae 

 long, moniliform, the rlagellum dull testaceous beneath; second and 

 third joints equal, and combined almost as long as fourth; mesothorax 

 and scutcllum highly polished, with sparse hut distinct punctures ; area 

 of metathorax large, semilunar, covered with coarse vermiform rugae-; 

 posterior truncation very coarsely punctured ; tegulae dark reddish 

 brown ; wings hyaline, stigma and nervures fusco-ferruginous ; third 

 submarginal cell very lar-?e, broad above ; spurs pale ferruginous : 

 abdomen elongate, smooth and highly polished ; first segment black 

 with apical margin broadly red : second and third red with a broad 

 black band, suffusedly interrupted laterally; fourth black with apical 

 margin broadly red; fifth black, as also sixth; apical plate red. 



Longs Peak Inn, on an umbelliferous flower, July 21 

 (Cockerell). Named after Enos Mills. Allied to S. clema- 

 tidis Rob., but larger, wi'h the abdomen differently marked. 

 From S. sulcatulns Ckll. it is easily known by the largely red 

 legs. 



Halictus lerouxii Lepel. T. S., 1 $ at Orcocarya virgata. 



Halictus galpinsiae Ckll. T. L., 1 $ . I was astonished to find 

 this at such an altitude. 



Halictus virgatellus Ckll. L., 1 $. The male is new, and is 

 determined as this species because it has the characters to be expected 

 in male rir(jatcllns. It differs from H. typographies Ckll. by the 

 entirely dark antennae, grayish wings and much darker stigma. 



Halictus pruinosiformis Crawf. L., 1 9 . 



Halictus peraltus Ckll. L., 1 $, July 19 (IF. /'. O. 



Halictus nigricallis Vachel. L., 1 $. The tubercles have a small 

 inconspicuous pale spot posteriorly. 



